Centrifugal fuse



M Jan. 18, 1927. ,614,537

B. PANTOFLI CTEK CENTRIFUGAL IT'USE Filed June 1 1925 Patented Jan. 18, 1927.

h l lliED STATES eaten BOHDAN PANTOFLiEK, OF LOCHOTIN, "EILSEN, OZECHOSLOVAKIA.

CENTRIEUG-AL FUSE.

Application filed June 1, .1925, Serial No. M3 18, and in Czechoslovakia June 9, 1924. V

radially outwardly directed motion or the rotary motion storing up a force or caus- 9 in some other change of state to take place,

through which the weights, after the rotation has ceased, are caused to perform a return motion. During this return motion the weights move beyond the original posi- 1 tion and there cause the needle to be released, which lies in the axis of rotationof the shell.

In the accompanying drawings, Fig. 1 is a plan view of a fuse according to the invention. Fig. 2 is a longitudinal section on line AB of Fig. 1.

1 is the body of the fuse containing the centrifugal weights and having a recess 2, in which the centrifugal weight 3 is guided, which has the form of a horse shoe, the centre of gravity of which is eccentric in the axis of rotation of the shell. In the iddle of the centrifugal weight 3 is a hole 5, through which the striker 6 can pass. On one side the centrifugal weight is divided into two limbs 7. Between these two limbs, which are so apart that the striker 6 can pass between them, a tongue 8 of the body of the fuse extends. Against the said tongue 8, which has shoulders 9, the balls rest, which are pressed by the spring acting on the centrifugal weight 3 against the said shoulders 9 by the limbs '7 of the centrifugal weight 3. whereby the centrifugal weight 3 is secured in its position.

This arrangement acts in t he following manner :-Through the rotation of the shell during its flight, the weight 3 will be caused to perform a radial outward movement and to compress the spring 11. At the same time the balls 10 will move radially outwards and leave the shoulders 9. On the impact of the shell the latter will cease to rotate, the centrifugal weight 3 being no longer exposed to centrifugal force. Hence the spring 11 will seek to cipand and will force the centi.'ifu.-.::sl weight 3 radially inwards. Owing to the displacement of the balls 10, the tongue 8 will slide inwards between the limbs 7 and the hole 5 will come into the axis of the shell. During this movement the tongue 8 will hold the striker 6 in the central position andthe striker, as soon as the centre of the hole 5 coincides with'the axis of the shell, will befree to pass through the hole 5, as the collar 12 of the striker will nolonger rest on the limbs 7 so that the striker 6 will cause the detonator 13 to ignite.

Vfhat I claim is V 1. A centrifugal fuse for shells which rotate about their longitudinal axis, comprising a fuse body, a centrifugal weight, means action of the centrifugal weight, a striker, means for securing the centrifugal weightin an inoperative position and means for preventing the striker from coming into operat1on until the centrifugal weight has been sufficiently moved by the stored force in an opposite direction to that of thecentrifugal force after the latter has ceased to act.

2. A centrifugal fuse as claimed in claim 1, in which the centrifugal weight has the form of a hore shoe (3), the centre of gravity of which lies eccentrically to the axis of rotation of the shell and in which the body of the fuse has a recess (2) for guiding the centrifugal weight.

3. A centrifugal fuse as claimed in claim form of a horse shoe (3), the centre of gravity of which lies eccentrically to the axis of rotation of theshell, in whichthe body of the fuse has a recess (2) for guiding the centrifugal weight, in which the means capable of storing energy comprises a spring (11) which forces the centrifugal weight radially inwards and in which a tongue (8) forming part of the fuse body extends between the limbs (7) of the horseshoe-shaped centrifugal weight (3), shoulders (9) on the tongue, balls (10) which are kept pressed against the shoulders (9) by the limbs (7 of the centrifugal weight (3) and the spring (11) acting radially inwards on the latter,

capable of' storing energy under the weight (3) is prevented.

5. A centrifugal fuse as claimed in claim 1 in which the centrifugal weight has the form of a horseshoe (3), the centre of gravity of which lies eccentrically to the axis of rotation of the shell, in which the body of the fuse has a recess (2) for guiding the centrifugal weight, in which the means capable of storing energy comprises a spring (11) which forces the centrifugal weight radially inwards, in which tongue (8) forming part of the fuse body extends between the'limbs (7) of the horseshoe-shaped centrifugal weight- (3), shoulders (9) on the tongue, balls (10) which are kept pressed against the shoulders (9) by the limbs (7) of the centrifugal weight (3) and the spring (11) acting radially inwards on the latter. whereby a displacement of the centrifugal weight is prevented, the securing means for the striker comprising a collar (12) on the striker and the releasing means for the striker comprising an opening (5) in the horseshoe-shaped cen trifugal weight sufficiently wide to allow the collar to pass. y

In testimony whereof I have signed my name to this specification.

' 'BOHDAN PANTOFLICEK. 

